The diagram below shows an iron bar which supports a bridge. The iron bar is connected to a piece of magnesium metal.

      

The diagram below shows an iron bar which supports a bridge. The iron bar is connected to a piece of magnesium metal.
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Explain why it is necessary to connect the piece of magnesium metal to the iron bar.

  

Answers


John
Magnesium is above iron in the activity series. It supplies electrons to the iron bar hence prevents it from rusting.
johnmulu answered the question on April 6, 2017 at 11:53


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